Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy   Age range and collections

Chaetasterina

Asteroidea - Valvatida - Chaetasteridae

Taxonomy
Chaetasterina was named by Hess (1970) [Sepkoski's age data: K Haut-u]. It is not extant. Its type is Chaetasterina gracilis. It was considered monophyletic by Hess (1970).

It was assigned to Chaetasteridae by Hess (1970); and to Valvatida by Sepkoski (2002).

Synonymy list
YearName and author
1970Chaetasterina Hess p. 1082
2002Chaetasterina Sepkoski, Jr.

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumAsterozoa
RankNameAuthor
classAsteroidea
subclassAmbuloasteroidea
infraclassNeoasteroidea()
superorderValvatacea
orderValvatida
familyChaetasteridae
genusChaetasterina

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
H Hess 1970Arms rounded. Superomarginal only slightly recognizable by their larger size from the other aboral plates. Inferomarginal plates slightly smaller than the superomarginals. Aboral plates with a crown of small acicular spine. Marginal and plates of the oral face with an external face entirely covered by spinelets (no paxilla). Spines of the ambulacral groove only slightly larger than those of the other parts. Actinolateral plates extending far, close to the tip of the arm. Actinolateral, marginals and adambulacral plates arranged in transversal rows. Mouth angle plate small. No pedicellariae.